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    <title>Document</title>
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<body>
    <script>

        // let a = 1
        // let b = 'xixihaha'
        // let c = true

        // // console.log(a);
        // // console.log(b);
        // // console.log(c);

        // let d = new String('heihei')
        // console.log(Object.toString.call(d));

        const obj = {
            uname: 'ww',
            age: 18
        }
        const newObj = {

        }
        Object.assign(newObj, obj)
        console.log(newObj);
    </script>
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